Meter-testing switch



C. D. PLATT.v

MEYER TESTING SWITCH.

APPLlCATION man NOV.17, 1919.

Patented Janf18, 1921 2 SHEETS-SHEEI i,

ammo;

C. D. PLATT.

METER TESHNG SWITCH.

APPLlCATION FILED NOV. 11, 1919.

Patented Jam 13, 92k

2SHEET3-SHEE 2. 7 E L- A. 29 2X 63; 3?

.5 av .3 25 *i 24' 7 37 23 lei'n'plstes EIETER-TESTIEJG SSWIIM 1..

F all 207mm it may concern:

it known that L CLARENCE 1 a citiszcu of the United Swiss 0 iing; at Briclgepcrt, Connect i s. new and useful of which the following invenfzion relates perticuleriy to e cons-"emotion edsptefi to be an enafiiunce switch with connections for a meter encl means for disconnecting the from the local circuit and piecing it in circuit with testing instnimeuts without interrupting the sewim. v

The main object is to gar-wide a simple, comp- (5i and inexpensive constiuction by which them eta tesiiug operation be curried out by a simpie epei'eiion which cenoi iie iiu oioperly performed which will iiisuse the leaving oi the switch in its proper cii'cuib relation when the meter: operation is completed.

its pi'efei'reci form the invention the combination of s. doublebladed switch with a special arrangement of plus sockets end terminals together with a special plug. To connect the testing instruugeuss it is simply necessary to iBSSic plug in the sockets of the switch which action automatically disconnect-s the meter from the local circuit and places it in 'ciicuit with "she testing instruments. The retrieval of the plug uutcumtically restores the circuits to their normal operating condition.

Fig'm'el is a plan View of a switch. embodying" the improvements of my invention.

Fig. Q'is is a side View 0 the same taken from the leftof that of Fig. l. I

F 1g. 3, is a partial vci'tlcil sectional new of the upper end of the switch and showing circuit when the pens are in she normal 013- ersting position- Fig. 7, is a similar View showing the particular relation when the meter tcsting'instruments are connected the plug blades be ing shown in section on the plane of the line 7-7 of Fig. 4.

Allzhough such switches sire usually in $3.5, specification of Letters Application November A .caxseiised Jain 3193 all lie 3 ieiwii shown the ole side base are We socket 12, image est coi'isscuii plu socket l6 and 1 socket; 16 21116.

the switch lies as zine socketflfl hinge 23, slug soc 2 L socket 26 with its *3; contact 28 wit w; 23 and socket ed imgcther and contact me"; w th socizcs the two 3312 izcferfiably conneciecl by .nsir 30. Terminal 1? The cw and have a common bind}- i llech of the {131M135 11ml The screw such as 38,

block 31 is utroviale with sceu'trsl passage 39 for while wii'" of the testing iustmments. A cross clieii el 46 may be provided through which "she indivi lucl ends of she three-wiresof she testis insii'umeuts lecl. inciicates a i sad &2 and QQHIQPTGSGENI; the 'iestm 111st .e is. Y

t1 3 1 s when one s'r cm is in tne normal running position cue branch of the main. leads from terminal 11 tlnough the fuse lug in socket 12 then to the hinge post 13, 'laale 1%, conteci. and strip {M0 the local circuit ininel 17. The oilier sideoi the main is conuec'ced to the terminal 19 from which the (JII'CUH'Z passes through *tlxeblock m socket 2i),

thence to the hinge post 21, blade 22. contcc'i 23, terminal through the mete-r41, illlfinCB to terminal 29 contact. 28, soc'ket.26 and terminal 27 to the oisher side or" the loud circuit. When the meter is to be tested the plug is inserte'cl-wiih blades'32, 33 and respectively in the sockets 16, 24 and 26, as shown in Fig: 4. As the plug-is pushed in, the blade engages the contact 28 which is inclined at its outer end so that it may be forced away from the contact socket 26 as the blade enters. The separation of the contact 28 from contact socket 26 cuts out the main meter circuit but leaves the meter in circuit with the testing instruments. It will be noted however that the load circuit it not interrupted since it is merely diverted through the blade 33 to blade 34.

I. claim 1- i. In a meter testing switch, three plug sockets and an auxiliary contact normally engaging one of said sockets, said socket being adapted to be connected to a load circuit, the auxiliary contact being adapted to .be connected to a meter, one of the other sockets being adapted to be connected to the load circuit and to the meter and the remaining socket being adapted to be connected to the meter in combination With a plug having four blades three of which are adapted to engage said sockets and the other of which. is adapted to engage the auxiliary contact and separate it from the socket adjacent thereto.

In a meter testing switch, three sockets, a member normally in contact with one socket, load circuit and meter terminals connected to said sockets and member, a plug having depending arms to engage said sockets and permit the current to flow to the load circuit without passing through the meter, and another arm on said-plug which upon further depression of the plug disengages said member from its adjacent socket and connects the meter to testing instruments.

In a meter testing switch, load circuit and meter terminals, means of connection between one load circuit terminal and one meter" terminal, plug contacts connected with said terminals and a plug for co-acting with said contactscomprising a block, two depending connected arms fastened to said block, a third arm at right angles to the first named arms, and a shorter arm parallel to the first mentioned arms, for the purpose described.

4. In a meter testing switch, the combination of two meter terminals, a load terminal, and a common terminal, plug contacts connected to each of said terminals, one of said meter terminal contacts normally engaging said load terminal contact but adapted to be disengaged by a plug.

5. In a meter testing switch, the combination of two meter terminals, a load circuit terminal, and a common terminal, three plug contacts electrically connected respectively with said load circuit terminal, one of said meter terminals and said common terminal, and a switch member normally connecting the other meter terminal with said local circuit terminal and adapted to be retracted by engagement of a testing plug and adapted to automatically return upon disengagement of the testing plug.

6. In a construction of the character described, a double bladed switch, a combined meter terminal and plug contact connected to one side of the switch, aload circuit terminal and contact adjacent thereto, a meter terminal and connected spring contact normally engaging said last mentioned contact, and a common meter and load circuit terminal and plug contact electrically connected with the other side of said switch.

7. In a construction of the character described, a main two bladed entrance switch and stationary switch contacts,'a meter terminal and plug contact connected toone of said stationary switchcontacts, a load line terminal and plug contact, a second meter terminal and connected spring contact mounted adjacent said load terminal and plug contact and normally engaging the latter, a third plug contact electrically connected to another of said stationary switch contacts, and a meter and another load line terminal connected to said third plug contact, each of said plug contacts being engageable by a plug and said spring contact being adapted to be moved out of engagement with its plug contact by means of a plug.

In a meter testing switch, a base, a meter terminal and connected plug contact on said base, a load line terminal and connected plug cbntact on said base,'a second meter terminalon said base, a spring contact connected to said last mentioned meter terminal normally connected with said load line terminal, a third plug contact connected to the meter and to another load line, each of said plug contacts being adapted to be engaged by a plug and to have said spring contact and load line terminal disconnected thereby.

9. In a meter testing switch, two main terminals, a plug contact and meter and load terminal means connected to one of said main terminals, a plug contact and meter terminal connected to the other main terminal, a third plug contact and a load terminal, a meter terminal and a connected spring plug contact normally engaging said third plug contact but adapted to be disengaged by the insertion of a plug.

CLARENCE I). PLA'IT. 

